Commit Graph

1730 Commits

Author SHA1 Message Date
sanket1729 92ee5a7e5f Test BIP341 sighash code 2022-01-01 04:12:46 +05:30
Riccardo Casatta 5dfb93df71
Deprecate StreamReader
StreamReader before this commit is trying to repeatedly parse big object like
blocks at every read, causing useless overhead.
consensus_encode deal with partial data by simply blocking.

After this changes it doesn't look what remain of the StreamReader is really giving
value, so it's deprecated
2021-12-31 10:44:14 +01:00
Dr. Maxim Orlovsky 670e808c17
Merge rust-bitcoin/rust-bitcoin#681: Add support for taproot psbt fields BIP 371
7d982fa9a2 Add all tests from BIP 371 (sanket1729)
d22e0149ad Taproot psbt impl BIP 371 (sanket1729)
108fc3d4db Impl encodable traits for TapLeafhash (sanket1729)
c7478d8fd0 Derive serde for taproot stuctures (sanket1729)

Pull request description:

  Built on top of #677 . Will rebase and mark ready for review after #677 is merged.

ACKs for top commit:
  apoelstra:
    ACK 7d982fa9a2
  dr-orlovsky:
    re-tACK 7d982fa9a2 basing on `git range-diff`. The original PR before last re-base was tested commit-by-commit.

Tree-SHA512: feb30e4b38d13110a9c0fabf6466d8f0fb7df09a82f4e01d70b8371b34ab0187004a6c63f9796c6585ee30841e8ee765ae9becae139d2e1e3d839553d64c3d1e
2021-12-30 02:12:03 +02:00
Dr. Maxim Orlovsky 86055d9df5
Merge rust-bitcoin/rust-bitcoin#672: New Witness struct to improve ser/de perfomance
106acdc3ac Add fuzzing for Witness struct (Riccardo Casatta)
2fd0125bfa Introduce Witness struct mainly to improve ser/de performance while keeping most usability. (Riccardo Casatta)

Pull request description:

  At the moment the Witness struct is  `Vec<Vec<u8>>`, the vec inside a vec cause a lot of allocations, specifically:

  - empty witness -> 1 allocation, while an empty vec doesn't allocate, the outer vec is not empty
  - witness with n elements -> n+1 allocations

  The proposed Witness struct contains the serialized format of the witness. This reduces the allocations to:

  - empty witness -> 0 allocations
  - witness with n elements -> 1 allocation for most common cases (you don't know how many bytes is long the entire witness beforehand, thus you need to estimate a good value, not too big to avoid wasting space and not too low to avoid vector reallocation, I used 128 since it covers about 80% of cases on mainnet)

  The inconvenience is having slightly less comfortable access to the witness, but the iterator is efficient (no allocations) and you can always collect the iteration to have a Vec of slices. If you collect the iteration you end up doing allocation anyway, but the rationale is that it is an operation you need to do rarely while ser/de is done much more often.

  I had to add a bigger block to better see the improvement (ae860247e191e2136d7c87382f78c96e0908d700), these are the results of the benches on my machine:

  ```
  RCasatta/master_with_block
  test blockdata::block::benches::bench_block_deserialize                 ... bench:   5,496,821 ns/iter (+/- 298,859)
  test blockdata::block::benches::bench_block_serialize                   ... bench:     437,389 ns/iter (+/- 31,576)
  test blockdata::block::benches::bench_block_serialize_logic             ... bench:     108,759 ns/iter (+/- 5,807)
  test blockdata::transaction::benches::bench_transaction_deserialize     ... bench:         670 ns/iter (+/- 49)
  test blockdata::transaction::benches::bench_transaction_get_size        ... bench:           7 ns/iter (+/- 0)
  test blockdata::transaction::benches::bench_transaction_serialize       ... bench:          51 ns/iter (+/- 5)
  test blockdata::transaction::benches::bench_transaction_serialize_logic ... bench:          13 ns/iter (+/- 0)

  branch witness_with_block (this one)
  test blockdata::block::benches::bench_block_deserialize                 ... bench:   4,302,788 ns/iter (+/- 424,806)
  test blockdata::block::benches::bench_block_serialize                   ... bench:     366,493 ns/iter (+/- 42,216)
  test blockdata::block::benches::bench_block_serialize_logic             ... bench:      84,646 ns/iter (+/- 7,366)
  test blockdata::transaction::benches::bench_transaction_deserialize     ... bench:         648 ns/iter (+/- 77)
  test blockdata::transaction::benches::bench_transaction_get_size        ... bench:           7 ns/iter (+/- 0)
  test blockdata::transaction::benches::bench_transaction_serialize       ... bench:          50 ns/iter (+/- 5)
  test blockdata::transaction::benches::bench_transaction_serialize_logic ... bench:          14 ns/iter (+/- 0)
  ```

  With an increased performance to deserialize a block of about 21% and to serialize a block of about 16% (seems even higher than expected, need to do more tests to confirm, I'll appreciate tests results from reviewers)

ACKs for top commit:
  apoelstra:
    ACK 106acdc3ac
  sanket1729:
    ACK 106acdc3ac
  dr-orlovsky:
    utACK 106acdc3ac

Tree-SHA512: e4f23bdd55075c7ea788bc55846fd9e30f9cb76d5847cb259bddbf72523857715b0d4dbac505be3dfb9d4b1bcae289384ab39885b4887e188f8f1c06caf4049a
2021-12-30 01:55:44 +02:00
Riccardo Casatta e511670e43
Merge rust-bitcoin/rust-bitcoin#722: Allow specifing a raw `TapLeafHash` in sighash computation
2959e04ebd Allow specifing a raw `TapLeafHash` in sighash computation (Alekos Filini)

Pull request description:

  Still need to add some tests but the code should be ready for review. Please let me know if you have better ideas for the enum naming.

  ---

  Instead of always requiring the full raw script and leaf version, allow
  just specifying a raw leaf hash to the sighash computation functions.

  This is very useful when dealing with PSBTs, because the
  `PSBT_IN_TAP_BIP32_DERIVATION` field only maps a public key to a leaf
  hash, so a signer could just take it and produce a signature with it
  rathern than having to jump through hoops to recover the full raw
  script.

ACKs for top commit:
  sanket1729:
    Tested locally. ACK 2959e04. Reviewed range-diff with 5aa1d02
  apoelstra:
    ACK 2959e04ebd

Tree-SHA512: 830be0b8382ac59b73e6481f61ec1effdcd32859c04382e6cd5a43ac689d6e528f9a8b27c026ee81f5d5b59d2e3c397f9c271145e001ff2dc4815764fc21a2c6
2021-12-29 18:08:45 +01:00
sanket1729 7d982fa9a2 Add all tests from BIP 371 2021-12-28 20:40:58 +05:30
sanket1729 d22e0149ad Taproot psbt impl BIP 371 2021-12-28 20:40:58 +05:30
sanket1729 108fc3d4db Impl encodable traits for TapLeafhash 2021-12-28 20:40:58 +05:30
sanket1729 c7478d8fd0 Derive serde for taproot stuctures 2021-12-28 20:40:58 +05:30
Riccardo Casatta 106acdc3ac
Add fuzzing for Witness struct 2021-12-28 09:56:41 +01:00
Riccardo Casatta 2fd0125bfa
Introduce Witness struct mainly to improve ser/de performance while keeping most usability.
Witness struct is in place of the Vec<Vec<u8>> we have before this commit.

from_vec() and to_vec() methods are provided to switch between this type and Vec<Vec<u8>>

Moreover, implementation of Default, Iterator and others allows to have similar behaviour but
using a single Vec prevent many allocations during deserialization which in turns results in
better performance, even 20% better perfomance on recent block.

last() and second_to_last() allows to access respective element without going through costly Vec
transformation
2021-12-28 09:56:38 +01:00
sanket1729 b945a5e5c6
Merge rust-bitcoin/rust-bitcoin#665: transactions: add a note about `get_vsize` and standardness rules
826fed53f2 transactions: add a note about `get_vsize` and standardness rules (Antoine Poinsot)

Pull request description:

  If they ever hit a discrepancy they must really be doing something dodgy but hey :)

ACKs for top commit:
  dr-orlovsky:
    ACK 826fed53f2

Tree-SHA512: c618a80b047797625a233939d2c1146e8b4ce44215648841813f78178577afc844f5e561e4e60b4084e315735894ecb354af8d81f4702f5354e5d5cd05b52ac4
2021-12-28 02:35:54 +05:30
Alekos Filini 2959e04ebd
Allow specifing a raw `TapLeafHash` in sighash computation
Instead of always requiring the full raw script and leaf version, allow
just specifying a raw leaf hash to the sighash computation functions.

This is very useful when dealing with PSBTs, because the
`PSBT_IN_TAP_BIP32_DERIVATION` field only maps a public key to a leaf
hash, so a signer could just take it and produce a signature with it
rathern than having to jump through hoops to recover the full raw
script.
2021-12-27 16:18:19 +01:00
Riccardo Casatta 9e1f256b54
Merge rust-bitcoin/rust-bitcoin#731: Improve parsing of `Denomination` string
f690b8e362 Be more liberal when parsing Denomination (Tobin Harding)
628168e493 Add missing white space character (Tobin Harding)

Pull request description:

  There is no reason to force users to use a particular format or case for `Denomination` strings. Users may wish to write any of the following and all seem reasonable
  - 100 sats
  - 100 sat
  - 100 SAT

  The same goes for various other `Denomination`s.

  - Patch 1 enables usage of "sats", "sat", "bit", "bits"
  - Patch 2 enables usage of various lower/uper case formatting

  Fixes: #729

ACKs for top commit:
  Kixunil:
    ACK f690b8e362
  apoelstra:
    ACK f690b8e362

Tree-SHA512: a785608e19a7ba6f689dc022cb17a709041ff56abeaa74649d0832a8bd8aac4593c7a79b46a47dd417796c588d669f50fb3c8b8a984be332ca38a1fef2dcd4ce
2021-12-27 10:17:40 +01:00
Riccardo Casatta 5f4755004d
Merge rust-bitcoin/rust-bitcoin#744: Fixed docs.rs metadata
9ef1c1e64a Fixed docs.rs metadata (Martin Habovstiak)

Pull request description:

  This changes `rustc-args`, which doesn't do what we want, to `rustdoc-args`,
  which does.

  Because of huge value/effort ratio assigning medium priority and 0.28 milestone - would be a real shame to release without this.

ACKs for top commit:
  apoelstra:
    blindly ACK 9ef1c1e64a
  RCasatta:
    utACK 9ef1c1e64a

Tree-SHA512: b62b10bbb2120967cd0d42317707e51e1b2057cb4c8a5c5b3ff0be8e0beaf9e1f1a060002590c66e187e1e0da8016e1d035d7cbe7ca7fb08276791df3f256077
2021-12-27 10:16:37 +01:00
Riccardo Casatta 38f93605d1
Merge rust-bitcoin/rust-bitcoin#749: Re-export SigHashType in lib.rs
3eea63e42b Re-export SigHashType in lib.rs (sanket1729)

Pull request description:

  Using the latest version of rust-bitcoin master on rust-miniscript
  errors on bitcoin::SigHashType not found. In the original PR, I only
  renamed the export to ECDSASigHashType, but original re-export should
  also be there in lib.rs to avoid breaking changes downstream.

  Fixup to #702

  Before this PR,

  ```
     |
  89 |         required: bitcoin::SigHashType,
     |                            ^^^^^^^^^^^ not found in `bitcoin

  ```

  After this PR,

  ```
  warning: use of deprecated type alias `bitcoin::SigHashType`: Please use [`EcdsaSigHashType`] instead
    --> src/psbt/mod.rs:89:28
     |
  89 |         required: bitcoin::SigHashType,

  ```

ACKs for top commit:
  apoelstra:
    ACK 3eea63e42b
  RCasatta:
    ACK 3eea63e42b

Tree-SHA512: 9cb8683835828e316ffa782c2a249559b4e534aa251b61667f3512b4e872fd88c726615c626ed9abf2061d31dc815ee77bb3d064962c93d0e0befd722fc2ceeb
2021-12-27 10:08:37 +01:00
sanket1729 3eea63e42b Re-export SigHashType in lib.rs
Using the latest version of rust-bitcoin master on rust-miniscript
errors on bitcoin::SigHashType not found. In the original PR, I only
renamed the export to ECDSASigHashType, but original re-export should
also be there in lib.rs to avoid to breaking changes downstream.
2021-12-26 04:56:25 +05:30
Riccardo Casatta f9b3fc9ce8
Merge rust-bitcoin/rust-bitcoin#686: Fixed a bunch of clippy lints, added clippy.toml
779d4110c6 Fixed a bunch of clippy lints, added clippy.toml (Martin Habovstiak)

Pull request description:

  This is the initial step towards using and maybe enforcing clippy.
  It does not fix all lints as some are not applicable. They may be
  explicitly ignored later.

  Some discussion about clippy was in #685

ACKs for top commit:
  apoelstra:
    ACK 779d4110c6
  RCasatta:
    ACK 779d4110c6

Tree-SHA512: fb9192c77565a0b1b2118877c6413945d65900e4e95b3741107bf6cddef1fa65ff09fc5b7814de421382292321cca6bd860bf17b73a227d193a0a13758ee25eb
2021-12-24 09:41:03 +01:00
Riccardo Casatta 6fa8a82414
Merge rust-bitcoin/rust-bitcoin#695: BIP341 test vectors
7aacc3782a Add tests from BIP341 (sanket1729)
61629cc733 Make taproot hashes forward display (sanket1729)

Pull request description:

  Add tests for taproot.
  - ~Also fixes one bug in #677, namely, I was returning `LeafVersion::default()` instead of given version~
  - ~ Fixes a bug in #691 about taking secp context as a reference instead of consuming it. This should have not passed my review, but this is easy to miss. ~
  - Makes the display on taproot hashes forward instead of the reverse (because the BIP prints in a forward way, I think we should too and it is more natural. )

ACKs for top commit:
  RCasatta:
    ACK 7aacc3782a
  apoelstra:
    ACK 7aacc3782a

Tree-SHA512: 2e0442131fc036ffa10f88c91c8fc02d9b67ff6c16c592aa6f4e6a220c26a00fc6ca95a288f14aa40667a289fb0446219fd6c76c0196ead766252356592b9941
2021-12-23 15:32:49 +01:00
Tobin Harding f690b8e362 Be more liberal when parsing Denomination
There is no reason to force users to use one particular form when
providing a denomination string. We can be liberal in what we accept
with no loss of clarity.

Allow `Denomination` strings to use a variety of forms, in particular
lower case and uppercase.

Note, we explicitly disallow various forms of `Msat` because it is
ambiguous whether this means milli or mega sats.

Co-developed-by: Martin Habovštiak <martin.habovstiak@gmail.com>
2021-12-22 13:51:11 +11:00
Martin Habovstiak 779d4110c6 Fixed a bunch of clippy lints, added clippy.toml
This is the initial step towards using and maybe enforcing clippy.
It does not fix all lints as some are not applicable. They may be
explicitly ignored later.
2021-12-21 22:50:13 +01:00
Martin Habovstiak 9ef1c1e64a Fixed docs.rs metadata
This changes `rustc-args`, which doesn't do what we want, to `rustdoc-args`,
which does.
2021-12-17 13:49:54 +01:00
Riccardo Casatta fe43e3c9d7
Merge rust-bitcoin/rust-bitcoin#710: Refactor bitcoin_merkle_root functions
b454cf8e15 Return None from merkle_root functions (Tobin Harding)
7a8b017ea3 Use correct spelling of merkle (Tobin Harding)

Pull request description:

  ~Do two minor refactorings to the `bitcoin_merkle_root[_inline] functions.~

  This PR has grown, is no longer a refactoring because the two functions have been changed to return an `Option`.

  First patch is cleanup. Here is the commit message for the second patch
  ```
  The merkle_root of an empty tree is undefined, this is the only error
  case we have for the two `bitcoin_merkle_root*` functions. We can fully
  describe this error case by returning an `Option` if args are found to
  be empty.

  While we are at it, refactor out a recursive helper function to make
  reading the code between the two functions easier.
  ```

ACKs for top commit:
  Kixunil:
    ACK b454cf8e15
  dr-orlovsky:
    ACK b454cf8e15

Tree-SHA512: 961714a8b0eb0dad493a1548317d875d64ca22d2d584c905c502369b5f6e5a9f8be1edd7345136b44964dc0bde7a4c43bfaff4287d1dbf7fd736da79818074e3
2021-12-16 09:48:29 +01:00
Riccardo Casatta e5c6d6559d
Merge rust-bitcoin/rust-bitcoin#742: add MAX_MONEY public constant to Amount
ab12410ae8 add MAX_MONEY public constant to Amount (z8674558)

Pull request description:

  Closes https://github.com/rust-bitcoin/rust-bitcoin/issues/740

ACKs for top commit:
  Kixunil:
    ACK ab12410ae8
  RCasatta:
    ACK ab12410ae8

Tree-SHA512: dfba40d8ae597d97653e13ba2ab1480822d5d75343da487e3d3e57cf6821bcc567d5a883be6fd76a3e1c7d60925fedc3a5a864789cf6370c6ebda0b1d02acdd1
2021-12-16 09:28:07 +01:00
Riccardo Casatta 970f574968
Merge rust-bitcoin/rust-bitcoin#702: Separate signature hash types
8361129518 Add SchnorrSig type (sanket1729)
94cfe79170 Rename existing SigHashType to EcdsaSigHashType (sanket1729)
648b3975a5 Add SchnorrSigHashType::from_u8 (sanket1729)
410e8bf46c Rename sighash::SigHashType::SigHashType to SchnorrSigHashType (sanket1729)
fa112a793a Add EcdsaSig (sanket1729)

Pull request description:

  Fixes #670 . Separates `SchnorrSigHashType` and `LegacySigHashType`. Also adds the following new structs:

  ```rust
  pub struct SchnorrSig {
      /// The underlying schnorr signature
      pub sig: secp256k1::schnorrsig::Signature,
      /// The corresponding hash type
      pub hash_ty: SchnorrSigHashType,
  }

  pub struct EcdsaSig {
      /// The underlying DER serialized Signature
      pub sig: secp256k1::Signature,
      /// The corresponding hash type
      pub hash_ty: LegacySigHashType,
  }
  ```

  This code is currently minimal to aid reviews. We can at a later point implement (Encodeable, psbt::Serialize, FromHex, ToHex) etc in follow-up PRs.

ACKs for top commit:
  Kixunil:
    ACK 8361129518
  RCasatta:
    ACK 8361129518

Tree-SHA512: 800ddcb3677a4f19e9d1c2a7eb7e95b0a677e9135e1e99f9e42956fc6a3fc94f639403076b4925b3adba6fdd95f56a99c2e47d0310675ad51ce5e7453c7355b6
2021-12-15 16:50:55 +01:00
sanket1729 36f3d230b8
Merge rust-bitcoin/rust-bitcoin#643: util/address: make address encoding more modular
506e03fa4d util/address: use hash functions of PublicKey/Script (Marko Bencun)
f826316c25 util/address: avoid .expect/panic (Marko Bencun)
ad83f6ae00 util/address: make address encoding more modular (Marko Bencun)

Pull request description:

  This allow library clients to plug their own encoding parameters in a
  backwards compatible manner.

Top commit has no ACKs.

Tree-SHA512: ae2ececbdfe4984fd62c975f4956686d79f6f5a6e65c34b55daa76fe785b8483ed7f35208d36b8bee545c7edd39ac878277a0fb8ea8c64a1943081e15c818bff
2021-12-15 20:17:45 +05:30
sanket1729 8361129518 Add SchnorrSig type
Export Sigs/Sigerrors
2021-12-15 20:00:52 +05:30
sanket1729 94cfe79170 Rename existing SigHashType to EcdsaSigHashType 2021-12-15 20:00:52 +05:30
sanket1729 648b3975a5 Add SchnorrSigHashType::from_u8 2021-12-15 20:00:52 +05:30
sanket1729 410e8bf46c Rename sighash::SigHashType::SigHashType to SchnorrSigHashType 2021-12-15 20:00:52 +05:30
sanket1729 fa112a793a Add EcdsaSig 2021-12-15 20:00:51 +05:30
z8674558 ab12410ae8 add MAX_MONEY public constant to Amount 2021-12-15 19:00:28 +09:00
sanket1729 b3cd308447
Merge rust-bitcoin/rust-bitcoin#743: add helpful message to division-by-zero panic
3e19983aa0 add helpful message to division-by-zero panic (z8674558)

Pull request description:

  Closes https://github.com/rust-bitcoin/rust-bitcoin/issues/739

ACKs for top commit:
  Kixunil:
    ACK 3e19983aa0
  sanket1729:
    cr ACK 3e19983aa0

Tree-SHA512: 60555da91e3c3053206b8c22c5b45f843b2f0fdfbfe46ff324c6ba49f64339447acd551991baecad2f411415f0ee7c50400df3f08465d8150bad264c50ed6c5d
2021-12-15 14:23:49 +05:30
sanket1729 d09ef6f356
Merge rust-bitcoin/rust-bitcoin#721: Improvements to script methods related to Taproot
d0a87bea72 Add slice 'serialize' method for TweakedPublicKey (Dr. Maxim Orlovsky)
37352d1df5 Add Display and LowerHex to TweakedPublicKey (Dr. Maxim Orlovsky)

Pull request description:

  Extraction of a portion from #696 which can be done without changes in `rust-secp256k1`

ACKs for top commit:
  Kixunil:
    ACK d0a87bea72
  sanket1729:
    ACK d0a87bea72

Tree-SHA512: d439ea1a4c4235bea9867e5d87514f928ad481f7a32403922654c33e101cfaba444eec8b61899f2aaaf1dcf5236bb618b9e14674736d3798effd56ca7097dc78
2021-12-15 14:10:35 +05:30
z8674558 3e19983aa0 add helpful message to division-by-zero panic 2021-12-15 01:50:56 +09:00
Riccardo Casatta 9ca6c75b18
Bench StreamReader 2021-12-12 17:33:24 +01:00
sanket1729 7aacc3782a Add tests from BIP341 2021-12-12 21:49:36 +05:30
sanket1729 61629cc733 Make taproot hashes forward display 2021-12-12 21:38:17 +05:30
Dr. Maxim Orlovsky d0a87bea72 Add slice 'serialize' method for TweakedPublicKey 2021-12-12 16:24:31 +02:00
Dr. Maxim Orlovsky 37352d1df5 Add Display and LowerHex to TweakedPublicKey 2021-12-12 16:23:57 +02:00
Marko Bencun 506e03fa4d
util/address: use hash functions of PublicKey/Script
Simpler code, less duplication.
2021-12-12 13:11:15 +01:00
Marko Bencun f826316c25
util/address: avoid .expect/panic 2021-12-12 13:11:15 +01:00
Marko Bencun ad83f6ae00
util/address: make address encoding more modular
This allow library clients to plug their own encoding parameters in a
backwards compatible manner.
2021-12-12 13:10:48 +01:00
Dr. Maxim Orlovsky ed40f3d3a6
Merge rust-bitcoin/rust-bitcoin#728: Use un/tweaked public key types
b5bf6d7319 Improve rustdocs on schnorr module (Tobin Harding)
a6d3514f2b Return parity when doing tap_tweak (Tobin Harding)
7af0999745 Re-name TweakedPublicKey constructor (Tobin Harding)
3c3cf0396b Remove use of unreachable in error branch (Tobin Harding)
d8e42d153e Remove 'what' comments (Tobin Harding)
b60db79a3b Use un/tweaked public key types (Tobin Harding)
402bd993b2 Add standard derives to TweakedPublickKey (Tobin Harding)
9c015d9ce3 Add newline to end of file (Tobin Harding)

Pull request description:

  We have two types for tweaked/untweaked schnorr public keys to help users of the taproot API not mix these two keys up. Currently the `taproot` module uses 'raw' `schnoor::PublicKey`s.

  Use the `schnoor` module's tweak/untweaked public key types for the `taproot` API.

  Fixes: #725

  Please note, I saw this was labeled 'good-first-issue' but I ignored that and greedily implemented a solution because of two reasons
  1. We want to get taproot stuff done post haste.
  2. I'm struggling to follow what is going on with all the taproot work so this seemed like a way to get my hands dirty.

ACKs for top commit:
  dr-orlovsky:
    utACK b5bf6d7319
  sanket1729:
    ACK b5bf6d7319

Tree-SHA512: e3e0480e0d193877c33ac11d0e3a288b0393d9475b26056914e439cb3f19583c1936e70d048df8d2120a36a63b6b592d12e21ca3ab7e058dce6f8f873c3b598b
2021-12-12 08:31:50 +02:00
Dr. Maxim Orlovsky 9ae0f05d74
Merge rust-bitcoin/rust-bitcoin#701: Decrease Huffman Weights to u32
1518517374 Decrease Huffman weight type to 32 bits (Jeremy Rubin)

Pull request description:

  This builds on https://github.com/rust-bitcoin/rust-bitcoin/pull/699 but is the more bikesheddable part since it changes the API.

  > u32 of weight should be enough for any branch.
  -- Bill Gates

ACKs for top commit:
  dr-orlovsky:
    utACK 1518517374
  Kixunil:
    ACK 1518517374

Tree-SHA512: 9c507ae6129dda8dc069b0a142181a78cf89cb3ebf9d2169c46662822cb4ea9ed075bf484528f5399fe0ed383a425174a702e2d685f31c246f5a86c46ed17c3a
2021-12-11 22:41:16 +02:00
Tobin Harding b5bf6d7319 Improve rustdocs on schnorr module
Improve the docs by doing:

- Use [`Foo`] for types
- Use third person tense
- Add trailing periods
2021-12-10 11:46:20 +11:00
Tobin Harding a6d3514f2b Return parity when doing tap_tweak
Currently we calculate the parity during `tap_tweak` but do not return
it, this means others must re-do work done inside `tap_tweak` in order
to calculate the parity. We can just return the parity along with the
tweaked key.
2021-12-10 11:45:58 +11:00
Tobin Harding 7af0999745 Re-name TweakedPublicKey constructor
Keeping inline with the method on `UntweakedPublicKey` that outputs a
`TweakedPublicKey` we can use the same name, for the same reasons.

Use `dangerous_assume_tweaked` as the constructor name to highlight the
fact that this constructor should probably not be being used.
2021-12-10 11:45:06 +11:00
Tobin Harding 3c3cf0396b Remove use of unreachable in error branch
We currently run `tweak_add_check` and use the result as a conditional
branch, the error path of which uses `unreachable`. This usage of
`unreachable` is non-typical. An 'unreachable' statement is by
definition supposed to be unreachable, it is not clear why we would need
to have a conditional branch to check an unreachable statement.

Use `debug_assert!` so programmer errors get caught in un-optimised
builds but in optimised builds the call to `tweak_add_check` is not even
done.
2021-12-10 11:37:07 +11:00
Tobin Harding d8e42d153e Remove 'what' comments
When used, code comments should say _why_ we do something not _what_ we
do, the code already says what we do.

Remove 'what we do' style comments.
2021-12-10 11:37:07 +11:00